CN212452288U - A steel-concrete composite beam concrete bridge deck construction support - Google Patents
A steel-concrete composite beam concrete bridge deck construction support Download PDFInfo
- Publication number
- CN212452288U CN212452288U CN202020572416.1U CN202020572416U CN212452288U CN 212452288 U CN212452288 U CN 212452288U CN 202020572416 U CN202020572416 U CN 202020572416U CN 212452288 U CN212452288 U CN 212452288U
- Authority
- CN
- China
- Prior art keywords
- support
- steel
- bridge deck
- concrete
- bracket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 84
- 238000010276 construction Methods 0.000 title claims abstract description 69
- 239000002131 composite material Substances 0.000 title claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 5
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 5
- 241001330002 Bambuseae Species 0.000 claims description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 5
- 239000011425 bamboo Substances 0.000 claims description 5
- 239000011120 plywood Substances 0.000 claims description 5
- 239000002023 wood Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 238000003466 welding Methods 0.000 abstract description 4
- 238000010422 painting Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 description 6
- 239000011150 reinforced concrete Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 101100366060 Caenorhabditis elegans snap-29 gene Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
本实用新型属于钢混组合梁混凝土桥面板施工技术领域，具体提供了一种钢混组合梁混凝土桥面板施工支架，包括支架立柱、支架横梁、吊杆、底模和施工通道，支架立柱和吊杆的数量均为多根，支架横梁水平设置且支架横梁的下面间隔竖直连接多根支架立柱，多根支架立柱的下面水平连接底模，支架横梁和底模之间通过多根吊杆连接，底模的下面连接施工通道，解决了现有桥面板施工中托架法的桥面板主要承重结构支架在桥面板下方，整体为受压结构，重量较大，支架通常要与钢板梁焊接或者栓接，损伤钢板梁涂装的，本实用新型支架在桥面板上方，主要为受拉结构，整体重量小，支架与钢板梁焊接的位置在钢板梁顶面不涂装的部分，有效保护涂装。
The utility model belongs to the technical field of steel-concrete composite girder concrete bridge deck construction, and specifically provides a steel-concrete composite girder concrete bridge deck construction support, comprising a support column, a support beam, a hanger, a bottom form and a construction channel, a support column and a hanger The number of rods is multiple, the support beam is set horizontally, and the bottom of the support beam is vertically connected to multiple support columns, the bottom of the multiple support columns is horizontally connected to the bottom mold, and the support beam and the bottom mold are connected by multiple hangers. , The bottom of the bottom form is connected to the construction channel, which solves the problem that the main load-bearing structure bracket of the bridge deck in the existing bridge deck construction is under the bridge deck. Bolting, damage to the steel plate girder painting, the support of the utility model is above the bridge deck, mainly a tension structure, the overall weight is small, the welding position of the bracket and the steel plate girder is in the unpainted part of the top surface of the steel plate girder, effectively protecting the coating. Pack.
Description
Technical Field
The utility model belongs to the technical field of steel-concrete composite beam concrete decking, concretely relates to steel-concrete composite beam concrete decking construction support.
Background
The bridge deck installed in the steel-concrete composite beam is an important part of a bridge structure, and has important influence on the traffic capacity of roads. With the development of bridge construction in China, the research on bridge deck installation technology is gradually paid attention to, and wide and deep research is gradually carried out.
The steel plate combined beam bridge, in particular to the steel plate beam bridge with steel beams formed by combining a plurality of I-shaped main beams and cross beams, wherein the main beams are arranged at vertical intervals, the middle parts of the main beams are horizontally connected through the cross beams, and the top surfaces of the main beams are paved with panels. The concrete bridge deck slab has two processes of prefabricating and cast-in-place, the prior cast-in-place concrete bridge deck slab has no reasonable construction method, and the prior bridge deck slab construction usually adopts a bracket method.
The bracket method comprises the following steps: the main bearing structure (support) of the bridge deck is arranged below the bridge deck, and the whole bridge deck is of a compression structure and has larger weight. Brackets are typically welded or bolted to the steel beam, damaging the steel beam finish.
SUMMERY OF THE UTILITY MODEL
The utility model provides a reinforced concrete composite beam concrete decking construction support aims at overcoming the problems that the prior art has the main bearing structure (support) of the decking in the bracket method in the decking construction, the whole is a compression structure, the weight is larger, the support is welded or bolted with the steel plate girder, and the coating of the steel plate girder is damaged;
for this, the utility model provides a reinforced concrete composite beam concrete decking construction support, including support stand, support crossbeam, jib, die block and construction passageway, the quantity of support stand and jib is many, and the support crossbeam level sets up and the support crossbeam below the vertical many support stands of connecting in interval, the below horizontal connection die block of many support stands, connects through many jibs between support crossbeam and the die block, connects the construction passageway below the die block.
The support is characterized by further comprising an upper support parallel connection, support inclined struts and a lower support parallel connection, wherein two adjacent support stand columns sequentially pass through the upper support parallel connection, the support inclined struts and the lower support parallel connection from top to bottom, the upper support parallel connection and the lower support parallel connection are horizontally arranged, the upper ends of the support inclined struts are connected with the support stand columns at the left ends of the upper support parallel connection, and the lower ends of the support inclined struts are connected with the support stand columns at the right ends of the lower support parallel connection.
The hanger rod is made of finish-rolled deformed steel bars, and connecting nuts and gaskets are arranged at two ends of the hanger rod.
The hanger rod is made of steel bars or steel pipes, and threads are arranged at two ends of each steel bar or steel pipe.
The bottom die comprises a face plate and distribution beams, the face plate is connected to the upper surface of the distribution beams, the distribution beams comprise longitudinal distribution beams and transverse distribution beams, and the number of the longitudinal distribution beams is one layer or two layers.
When the number of the longitudinal distribution beams is one layer, the bottom die is structurally composed of a panel, the longitudinal distribution beams, the transverse distribution beams and the longitudinal distribution beams in sequence from top to bottom.
When the number of the longitudinal distribution beams is two, the bottom die is structurally composed of a panel, a transverse distribution beam and a longitudinal distribution beam from top to bottom in sequence.
The construction channel comprises a bottom plate and a wall body, the bottom plate is connected below the wall body, the bottom plate comprises an upper layer and a lower layer, a bamboo plywood or a wood board is laid on the upper layer, transverse section steel or square wood is laid on the lower layer, and the wall body is connected with a safety net.
The section steel is I14 steel.
A construction method of a construction support of a reinforced concrete composite beam concrete bridge deck slab comprises the following steps:
1) installing a steel-concrete composite beam concrete bridge deck slab construction support, connecting support stand columns to the top surfaces of upper flange plates of main beams, horizontally connecting support cross beams to the upper surfaces of a plurality of support stand columns, laying a distribution beam of a bottom die below the support stand columns, connecting the support cross beams with the distribution beam of the bottom die through a hanging rod, laying a construction channel on a lower flange plate of the main beams, wherein the distribution beam comprises a transverse distribution beam and a longitudinal distribution beam;
2) installing steel bars of a panel on the distribution beam in the step 1);
3) pouring concrete on the steel bars of the installed panel in the step 2);
4) curing the concrete poured in the step 3);
5) and (5) removing the construction support of the concrete bridge deck of the steel-concrete composite beam after maintenance.
The utility model has the advantages that: the utility model provides a this kind of steel-concrete composite beam concrete decking construction support, including support stand, support crossbeam, jib, die block and construction passageway, the quantity of support stand and jib is many, and support crossbeam level sets up and the interval below the support crossbeam vertically connects many support stands, and the below horizontal connection die block of many support stands, connects through many jibs between support crossbeam and the die block, connects the construction passageway below the die block; a construction method of a construction support of a reinforced concrete composite beam concrete bridge deck slab comprises the following steps: 1) installing a steel-concrete composite beam concrete bridge deck slab construction support, connecting support stand columns to the top surfaces of upper flange plates of main beams, horizontally connecting support cross beams to the upper surfaces of a plurality of support stand columns, laying a distribution beam of a bottom die below the support stand columns, connecting the support cross beams with the distribution beam of the bottom die through a hanging rod, laying a construction channel on a lower flange plate of the main beams, wherein the distribution beam comprises a transverse distribution beam and a longitudinal distribution beam; 2) installing steel bars of a panel on the distribution beam in the step 1); 3) pouring concrete on the steel bars of the installed panel in the step 2); 4) curing the concrete poured in the step 3); 5) after the maintenance is finished, dismantling the construction support of the concrete bridge deck of the steel-concrete composite beam; the construction support of the concrete bridge deck of the steel-concrete composite beam is mainly of a tension structure above the deck, the whole weight is small, and the welding position of the construction support of the concrete bridge deck of the steel-concrete composite beam and a steel plate beam (main beam) is on the part, which is not coated, of the top surface of the steel plate beam, so that the coating is effectively protected.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic cross-sectional structure of a construction support for a concrete bridge deck of a steel-concrete composite beam;
FIG. 2 is a schematic structural view of a longitudinal section of a construction support of a concrete bridge deck of a steel-concrete composite beam;
FIG. 3 is a schematic mechanical diagram of a first mold base;
fig. 4 is a schematic mechanism diagram of the second mold.
Description of reference numerals: 1. a bracket upright post; 2. a bracket beam; 3. a boom; 4. bottom die; 5. constructing a channel; 6. the upper bracket is in parallel connection; 7. a bracket diagonal bracing; 8. the lower bracket is connected in parallel; 9. a panel; 10. a longitudinal distribution beam; 11. a transverse distribution beam.
Detailed Description
Example 1:
as shown in fig. 1, a support for construction of a concrete-reinforced composite beam bridge deck slab comprises support columns 1, support beams 2, suspenders 3, a bottom die 4 and a construction channel 5, wherein the number of the support columns 1 and the suspenders 3 is multiple, the support beams 2 are horizontally arranged and vertically connected with the multiple support columns 1 at intervals below the support beams 2, the multiple support columns 1 are horizontally connected with the bottom die 4 below the bottom die, the support beams 2 and the bottom die 4 are connected through the multiple suspenders 3, and the construction channel 5 is connected below the bottom die 4.
A construction method of a construction support of a reinforced concrete composite beam concrete bridge deck slab comprises the following steps:
1) installing a steel-concrete composite beam concrete bridge deck slab construction support, connecting support upright posts 1 to the top surfaces of main beam upper flange plates, horizontally connecting support cross beams 2 to the upper surfaces of a plurality of support upright posts 1, laying a distribution beam of a bottom die 4 below the support upright posts 1, connecting the support cross beams 2 with the distribution beam of the bottom die 4 through a hanger rod 3, laying a construction channel 5 on a main beam lower flange plate, wherein the distribution beam comprises a transverse distribution beam 11 and a longitudinal distribution beam 10;
2) installing steel bars of a panel 9 on the distribution beam in the step 1);
3) pouring concrete on the steel bars of the installed panel 9 in the step 2);
4) curing the concrete poured in the step 3);
5) and (5) removing the construction support of the concrete bridge deck of the steel-concrete composite beam after maintenance.
The construction support for the concrete bridge deck of the steel-concrete composite beam is arranged above the deck 9, mainly has a tension structure, is small in overall weight, and effectively protects coating when the welding position of the construction support for the concrete bridge deck of the steel-concrete composite beam and a steel plate beam (main beam) is on the part, which is not coated, of the top surface of the steel plate beam.
Example 2:
as shown in fig. 2, on the basis of embodiment 1, the support structure further comprises an upper support parallel connection 6, a support inclined strut 7 and a lower support parallel connection 8, two adjacent support upright columns 1 sequentially pass through the upper support parallel connection 6, the support inclined strut 7 and the lower support parallel connection 8 from top to bottom to be connected, the upper support parallel connection 6 and the lower support parallel connection 8 are horizontally arranged, the upper end of the support inclined strut 7 is connected with the support upright column 1 at the left end of the upper support parallel connection 6, and the lower end of the support inclined strut 7 is connected with the support upright column 1 at the right end of the lower support parallel connection 8.
The support parallel connection 6 is welded with the support upright post 1 to prevent the support upright post 1 from toppling; support bracing 7 and support stand 1 and the welding of support tie 6, with the support tie 6 combined action, prevent that support stand 1 from empting, simple structure, stability is good, improves the construction security.
Example 3:
on the basis of embodiment 2, the hanger rod 3 adopts finish rolling screw-thread steel, and both ends of the hanger rod 3 are provided with a connecting nut and a gasket. The connector with the internal thread can be screwed on the reinforcing steel bar of the finish rolling deformed steel bar at any section to be connected or the nut with the thread is screwed on to be anchored, the adaptability is good, the strength is high, the height of the bottom die can be adjusted by the nut and the gasket, and the construction accuracy is guaranteed.
The suspender 3 adopts a steel bar or a steel pipe, and both ends of the steel bar or the steel pipe are provided with threads. The two ends are provided with threads, so that the height of the bottom die can be conveniently adjusted, and the operation is simple and convenient.
Example 4:
as shown in fig. 3, on the basis of embodiment 3, the bottom mold comprises a face plate 9 and a distribution beam, the face plate 9 is connected to the upper surface of the distribution beam, and the distribution beam comprises a longitudinal distribution beam 10 and a transverse distribution beam 11, and the number of the longitudinal distribution beams is one layer or two layers. The bottom die can adopt various structural forms and has strong adaptability. The panel can be made of bamboo plywood, thin steel plate and the like.
When the number of the longitudinal distribution beams is one layer, the bottom die is composed of a panel 9, a longitudinal distribution beam 10, a transverse distribution beam 11 and a longitudinal distribution beam 10 from top to bottom in sequence. The bottom die of the structure can be well adapted to the section change of the bridge deck slab.
As shown in fig. 4, when the number of the longitudinal distribution beams is two, the bottom die has a structure including a panel 9, a transverse distribution beam 11 and a longitudinal distribution beam 10 in sequence from top to bottom. The bottom die of the mechanism is simple in structure and low in cost.
Example 5:
on the basis of embodiment 4, construction passageway 5 includes bottom plate and wall body, and the bottom plate is connected below the wall body, and the bottom plate includes upper strata and lower floor, and bamboo plywood or plank are laid to the upper strata, and horizontal shaped steel or square timber are laid to the lower floor, wall connection safety net. The section steel is I14 steel. The specification and model of the material and the arrangement distance of the bottom plate are selected according to the structure calculation structure. The lower layer adopts 14 steel and 2 meters per road, the upper layer is fully paved with 2cm thick wood boards, and the ground is hung with a safety net.
Example 6:
a construction method of a construction support of a reinforced concrete composite beam concrete bridge deck slab comprises the following steps:
1) installing a steel-concrete composite beam concrete bridge deck slab construction support, connecting support upright posts 1 to the top surfaces of main beam upper flange plates, horizontally connecting support cross beams 2 to the upper surfaces of a plurality of support upright posts 1, laying a distribution beam of a bottom die 4 below the support upright posts 1, connecting the support cross beams 2 with the distribution beam of the bottom die 4 through a hanger rod 3, laying a construction channel 5 on a main beam lower flange plate, wherein the distribution beam comprises a transverse distribution beam 11 and a longitudinal distribution beam 10;
A. re-measuring the plane position, elevation and line type of the steel girder of the approach bridge before construction, and determining the accuracy of the construction position; and meanwhile, the plane position and the elevation of the construction support of the concrete bridge deck of the steel-concrete composite beam are measured and lofted, so that the accuracy of the installation position of the construction support of the concrete bridge deck of the steel-concrete composite beam is ensured.
B. Installing a support beam (a bearing main beam): the material that the bearing girder used is double-spliced 25b shaped steel, and the bearing girder installation adopts 130t truck crane to go on, welds in approach bridge girder steel top through double-spliced groove 32a, and in the installation, strict control stand top standard height deviation.
C. Installing a suspender: the hanger rod is made of phi 20 finish rolling deformed steel bars, the hanger rod is fixed with a bearing main beam double-spliced 25b and a lower bearing beam double-spliced groove 16 through nut gaskets, the upper nut and the lower nut are provided with backing plates during fixing, and the nuts and the gaskets are matched with the phi 20 finish rolling deformed steel bar hanger rod.
D. Installing a lower bearing beam and a distribution beam: the lower bearing beam adopts double-spliced-groove 16-type steel and is integrally arranged along the direction of the bridge; the distribution beam is made of double-spliced groove 10-type steel and is arranged along the transverse bridge direction. The lower bearing beam and the distribution beam are installed in a manner of truck crane hoisting and manual auxiliary carrying.
E. Bottom die installation: installing square timbers of 10 multiplied by 10cm along the bridge direction above the double-spliced groove 10, and paving bamboo plywood of 2cm thickness above the square timbers as a bridge deck construction template;
2) installing steel bars of a panel 9 on the distribution beam in the step 1);
according to the design drawing, the reinforcement of the bridge deck mainly comprises three reinforcements phi 12, phi 22 and phi 28. The blanking and processing of the reinforcing steel bars are finished in a reinforcing steel bar processing field. And (5) transporting the processed steel bars to an approach bridge through a flat car, and manually installing.
3) Pouring concrete on the steel bars of the installed panel 9 in the step 2);
the concrete is mixed by a mixing station, transported by a tank car, pumped and poured, and is firstly vibrated manually and then vibrated by a vibrating beam.
4) Curing the concrete poured in the step 3);
the concrete is maintained by sprinkling water on the geotextile, the maintenance time is not less than 14 days, and in order to ensure that the early expansion performance of the concrete is fully exerted, the water supplement during the maintenance period needs to be paid attention.
5) And (5) removing the construction support of the concrete bridge deck of the steel-concrete composite beam after maintenance.
In the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", etc., it is based on the orientation or positional relationship shown in the drawings, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020572416.1U CN212452288U (en) | 2020-04-17 | 2020-04-17 | A steel-concrete composite beam concrete bridge deck construction support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020572416.1U CN212452288U (en) | 2020-04-17 | 2020-04-17 | A steel-concrete composite beam concrete bridge deck construction support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212452288U true CN212452288U (en) | 2021-02-02 |
Family
ID=74472935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020572416.1U Active CN212452288U (en) | 2020-04-17 | 2020-04-17 | A steel-concrete composite beam concrete bridge deck construction support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212452288U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441244A (en) * | 2020-04-17 | 2020-07-24 | 中交二公局第二工程有限公司 | A steel-concrete composite beam concrete bridge deck construction support and construction method thereof |
-
2020
- 2020-04-17 CN CN202020572416.1U patent/CN212452288U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441244A (en) * | 2020-04-17 | 2020-07-24 | 中交二公局第二工程有限公司 | A steel-concrete composite beam concrete bridge deck construction support and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205443958U (en) | Composite truss support of big cantilever bent cap | |
| CN104480922B (en) | Space truss formwork system and construction method thereof | |
| CN111441244A (en) | A steel-concrete composite beam concrete bridge deck construction support and construction method thereof | |
| CN102392536B (en) | Construction method for long-span hanging vestibule type template support system | |
| CN218952006U (en) | Hanging frame structure for high pier column tie beam construction | |
| CN110409624B (en) | Reverse calculation and construction method for large equipment installation and main body structure | |
| CN105714683A (en) | Installation and dismantling method of high bent cast-in-situ aqueduct suspension type bailey frames | |
| CN111424948A (en) | Construction method and construction platform for cantilever structure layer of high-rise building | |
| CN110409318A (en) | A kind of large span freely-supported steel reinforced concrete bondbeam assembling method | |
| CN116289608A (en) | A construction method of beam-column cast-in-place beam support in narrow area | |
| CN110409319A (en) | A kind of cast-in-place floorings bracket of large span steel reinforced concrete combination beam and construction method | |
| CN110863563B (en) | Ultra-long cantilever and pull rod combined structure and construction method | |
| CN206942109U (en) | One kind is without special bracket and the protection support body of encorbelmenting of off-load industrialization security protection | |
| CN206902913U (en) | A kind of high-altitude long-span overhung structure | |
| CN103321155A (en) | Viaduct pier construction platform system and method for building system and pouring piers | |
| CN212452288U (en) | A steel-concrete composite beam concrete bridge deck construction support | |
| CN209114333U (en) | A combined steel structure unit block | |
| CN114687290A (en) | Construction method of shaped steel cast-in-place slab steel mixed beam | |
| CN114856086A (en) | Reinforced concrete double-limb bent frame column for heavy factory building and construction method thereof | |
| CN114263343A (en) | Formwork erecting method for combined building construction | |
| CN209620538U (en) | A full house support system based on multi-layer truss pieces | |
| CN219752998U (en) | Cantilever template framework for large-section double-chamber hollow thin-wall type high pier construction | |
| CN111535200A (en) | Anti-falling full-hall support structure and construction method | |
| CN117927011A (en) | Construction process of frame structure under aluminum alloy building template system | |
| CN116591462A (en) | A formwork-free structure and construction method for narrow space structural slab reverse construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20250324 Address after: 210000 No. 396 Binjiang Avenue, Jiangbei new area, Nanjing, Jiangsu Patentee after: East China Construction Co., Ltd. of CCCC Second Highway Engineering Co.,Ltd. Country or region after: China Address before: 710119 No.29, No.1 Enterprise Park, West Avenue, high tech Zone, Xi'an City, Shaanxi Province Patentee before: CCCC-SHEC SECOND ENGINEERING Co.,Ltd. Country or region before: China |